/Engine/Plugins/Media/ElectraSubtitles/Source/ElectraSubtitles/Public/IElectraSubtitleModule.h
Queries whether or not this plugin's modular feature is capable of handling subtitles of the specified format. The codec string is a commonly known format like "wvtt", "tx3g", "imsc1", etc. but may also be a MIME type like "application/ttml+xml" for sideloaded subtitles.
bool SupportsFormat ( const [FString](API\Runtime\Core\Containers\FString) & SubtitleCodecName ) const